- 您現在的位置：買賣IC網 > PDF目錄15535 > DM164134 (Microchip Technology)KIT DEV PIC18F4XK22 PDF資料下載
參數資料
| 型號： | DM164134 |
| 廠商： | Microchip Technology |
| 文件頁數： | 24/116頁 |
| 文件大?。?/td> | 0K |
| 描述： | KIT DEV PIC18F4XK22 |
| 標準包裝： | 1 |
| 系列： | PIC® 18F |
| 類型： | MCU |
| 適用于相關產品： | PIC18F4XK22，PIC18F2XK22 |
| 所含物品： | 板，文檔 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁當前第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁
2006 Microchip Technology Inc.
DS41159E-page 21
PIC18FXX8
2.6.2
OSCILLATOR TRANSITIONS
The PIC18FXX8 devices contain circuitry to prevent
“glitches” when switching between oscillator sources.
Essentially, the circuitry waits for eight rising edges of
the clock source that the processor is switching to. This
ensures that the new clock source is stable and that its
pulse width will not be less than the shortest pulse
width of the two clock sources.
Figure 2-7 shows a timing diagram indicating the tran-
sition from the main oscillator to the Timer1 oscillator.
The Timer1 oscillator is assumed to be running all the
time. After the SCS bit is set, the processor is frozen at
the next occurring Q1 cycle. After eight synchronization
cycles
are
counted
from
the
Timer1
oscillator,
operation resumes. No additional delays are required
after the synchronization cycles.
The sequence of events that takes place when switch-
ing from the Timer1 oscillator to the main oscillator will
depend on the mode of the main oscillator. In addition
to eight clock cycles of the main oscillator, additional
delays may take place.
If the main oscillator is configured for an external
crystal (HS, XT, LP), the transition will take place after
an oscillator start-up time (TOST) has occurred. A timing
diagram indicating the transition from the Timer1
oscillator to the main oscillator for HS, XT and LP
modes is shown in Figure 2-8.
FIGURE 2-7:
TIMING DIAGRAM FOR TRANSITION FROM OSC1 TO TIMER1 OSCILLATOR
FIGURE 2-8:
TIMING DIAGRAM FOR TRANSITION BETWEEN TIMER1 AND OSC1 (HS, XT, LP)
Q3
Q2
Q1
Q4
Q3
Q2
OSC1
Internal
SCS
(OSCCON<0>)
Program
PC + 2
PC
Note 1: Delay on internal system clock is eight oscillator cycles for synchronization.
Q1
T1OSI
Q4
Q1
PC + 4
Q1
Tscs
Clock
Counter
System
Q2
Q3
Q4
Q1
TDLY
TT1P
TOSC
2
13
4
5
6
7
8
Q3
Q4
Q1 Q2 Q3 Q4
Q1 Q2
OSC1
Internal System
SCS
(OSCCON<0>)
Program
PC
PC + 2
Note 1: TOST = 1024 TOSC (drawing not to scale).
T1OSI
Clock
OSC2
TOST
Q1
PC + 4
TT1P
TOSC
TSCS
12
3
4
5
6
7
8
Counter
相關PDF資料 |
PDF描述 |
|---|---|
| AIUR-07-221K | INDUCTOR POWER 220UH 10% T/H |
| MAX8903CETI+ | IC DC/DC CHARGER LI+ 2A 28-TQFN |
| MAX11080GUU/V+T | IC LI/BATTERY MANAGEMENT 38TSSOP |
| MAX11081GUU+T | IC FAULT MON BATT 12CH 38-TSSOP |
| MAX11081GUU/V+T | IC FAULT MON BATT 12CH 38TSSOP |
相關代理商/技術參數 |
參數描述 |
|---|---|
| DM164135 | 制造商:Microchip Technology Inc 功能描述:KIT, ONEPIC DEMO BOARD, PLUS PICKIT 3 制造商:Microchip Technology Inc 功能描述:KIT, ONEPIC DEMO BOARD, PLUS PICKIT 3; SVHC:No SVHC (19-Dec-2012) ;RoHS Compliant: Yes 制造商:Microchip Technology Inc 功能描述:One PIC MCU Platform Board with PICkit 3 |
| DM164135 | 制造商:Microchip Technology Inc 功能描述:PICKIT 3 IN-CIRCUIT DEBUGGER |
| DM173001 | 功能描述:開發(fā)板和工具包 - PIC / DSPIC PICDEM 17 PIC17CXX RoHS:否 制造商:Microchip Technology 產品:Starter Kits 工具用于評估:chipKIT 核心:Uno32 接口類型: 工作電源電壓: |
| DM180021 | 功能描述:開發(fā)板和工具包 - PIC / DSPIC PIC18 Starter Kit RoHS:否 制造商:Microchip Technology 產品:Starter Kits 工具用于評估:chipKIT 核心:Uno32 接口類型: 工作電源電壓: |
| DM1800-434MB | 功能描述:射頻模塊 DM1800 Base Station 433.92 MHz RoHS:否 制造商:Linx Technologies 產品:Transceiver Modules 頻帶:902 MHz to 928 MHz 輸出功率:- 15.5 dBm to + 12.5 dBm 接口類型:UART 工作電源電壓:- 0.3 VDC to + 5.5 VDC 傳輸供電電流:38.1 mA 接收供電電流:22.7 mA 天線連接器類型:U.FL 最大工作溫度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm |
發(fā)布緊急采購，3分鐘左右您將得到回復。